Evidence of color vision in a diurnal prosimian,Lemur catta

TwoLemur catta were tested in a WGTA on three two-choice color discrimination problems involving paired comparisons of red, green, and blue. Four illumination combinations between the two discriminanda served to make brightness irrelevant, hue being the only salient cue. All color problems were learned within criterion limits of 21 out of 25 correct choices during 16 consecutive test sessions, indicating good color vision for this diurnal prosimian.